HOT ROLLING METHOD, HOT-ROLLED METAL BAND AND ELECTRIC RESISTANCE WELDED TUBE

摘要

PROBLEM TO BE SOLVED: To reduce scrapped parts accompanying cutting or the like as small as possible and to improve the yield when manufacturing a hot-rolled metal band in a hot rolling line.

SOLUTION: Flying thickness change is performed during rolling a material to be rolled with a finishing mill on the hot rolling line so that the cutting predetermined parts of the material to be rolled are locally thinner as compared with the parts other than the cutting predetermined part.

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